Peel and boil potatoes in salted water until soft; drain, and mash smooth. Take a pint of the mashed potatoes; mix with 2 tablespoonfuls of melted butter and 1 egg; add a little flour, and form into balls. Put them into a well-buttered baking-pan; sprinkle with grated Parmesan cheese and bake in a quick oven to a golden brown. Serve with stewed chicken.